None of my Jewish friends care if they get Xmas cards, but the do care if they don't get a card when everyone else does!!!!
(Will there be curmudgeons? Of course! It pays to send them xmas cards the most. Because then you know who they are in the future!)
HOWEVER, most of my Jewish friends roll their eyes (but smile politely, knowing it was the thought that counts) at Chanukah Cards. Why? Because its not an important holiday. The High Holidays (fall) are important. Passover (spring) is important.
Chanukah is just not an important holiday. Its a really minor one (like Ascension day or All Saints Day for Christians) that is only 'important' because its near Christmas. Sort of like how you'd cock an eye row to be receiving all kind of "All Saints Day" stuff... Because the Jewish high holidays are near all saints day. Or tons of Ascension day stuff, because that's near Pessach.
So just send whatever Xmas cards you'd ordinarily send. That's inclusive, instead of well-meaning-but-WHY-do-Christians-DO-this (assigning I e of our minor holidays as equally important with one of their major holidays)